included READEME file

README.md

@@ -1 +1,12 @@
 # urlShortening
+This code converts the actual url to shortend url and when user clicks on sortend url its redirects to actual url.
+
+# Pre installation
+1. Nodejs 8 and above
+2. NPM 6 and above
+3. Mongo
+
+# Steps to be followed after cloning the project
+1. Open the terminal and go till the porject directory and type `npm init`
+2. Start the node server using `npm server.js` or `nodemon server.js`
+

server.js

@@ -3,7 +3,7 @@ const app = express();
 const mongoose = require('mongoose');
 const shortUrl = require('./models/urlShortner');
 
-mongoose.connect('mongodb://mongo_docker/UrlShortner', { 
+mongoose.connect('mongodb://localhost/UrlShortner', { 
     useUnifiedTopology: true,
     useNewUrlParser: true
 });